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Brian
-Original Message-
From: David Winsemius [mailto:dwinsem...@comcast.net]
Sent: Wednesday, March 14, 2012 2:44 PM
To: Davis, Brian
Cc: r-help@R-project.org
Subject: Re: [R] Needing a better solution to a lookup problem.
On Mar 14, 2012, at 3:27 PM, Davis
I have a solution (actually a few) to this problem, but none are
computationally efficient enough to be useful. I'm hoping someone can
enlighten me to a better solution.
I have data frame of chromosome/position pairs (along with other data for the
location). For each pair I need to determine
On Mar 14, 2012, at 3:27 PM, Davis, Brian wrote:
I have a solution (actually a few) to this problem, but none are
computationally efficient enough to be useful. I'm hoping someone
can enlighten me to a better solution.
I have data frame of chromosome/position pairs (along with other
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On
Behalf Of Davis, Brian
Sent: Wednesday, March 14, 2012 2:28 PM
To: r-help@R-project.org
Subject: [R] Needing a better solution to a lookup problem.
I have a solution (actually a few
You could try doing it without a loop (.C or other):
(rgnsnp - merge(region,snps))
(rgnsnp[with(rgnsnp,STOP=POS POS = START),])
Here is my test for merge+search on 100k/200k:
fdf1 - data.frame(chr=1:10,p=runif(10),d=sample(10))
fdf2 -
Subject: Re: [R] Needing a better solution to a lookup problem.
You could try doing it without a loop (.C or other):
(rgnsnp - merge(region,snps))
(rgnsnp[with(rgnsnp,STOP=POS POS = START),])
Here is my test for merge+search on 100k/200k:
fdf1 - data.frame(chr=1:10,p=runif(10),d
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